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Simplifying (7x9)(4x3) = 28x12 Remove parenthesis around (7x9) 7x9(4x3) = 28x12 Remove parenthesis around (4x3) 7x9 * 4x3 = 28x12 Reorder the terms for easier multiplication: 7 * 4x9 * x3 = 28x12 Multiply 7 * 4 28x9 * x3 = 28x12 Multiply x9 * x3 28x12 = 28x12 Add '-28x12' to each side of the equation. 28x12 + -28x12 = 28x12 + -28x12 Combine like terms: 28x12 + -28x12 = 0 0 = 28x12 + -28x12 Combine like terms: 28x12 + -28x12 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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